What HbA1c level indicates diabetes?

• A. 5.0%
• B. ≥6.5%
• C. 6.0%
• D. 4.5%

Answer: (B)

HbA1c is a measure of average blood glucose over the past two to three months. A level of six point five percent or higher is used as the diagnostic threshold for diabetes because it reflects sustained, long-term hyperglycemia and is reproducible across labs. Values below that indicate normal or prediabetes ranges, with roughly five to six point four percent representing prediabetes and below five percent considered normal. In practice, a diabetes diagnosis is typically confirmed with a second test on a different day unless symptoms of high blood sugar are clearly present or a high random reading already indicates diabetes.